Machine for edge-curling sheet metal



48heets-Sheet 1.

Patented Sept. 20, 1892.

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(No Model.)-

' W. J. GORDONKB- E. D. GILBERT.

MACHINE FOR EDGE OURLING'SHEET METAL. No. 482,962.

WITNESSES 456 Q 4 Shets-Sheet 2.

(No Model.)

T Rm M Lm E w m .H R &% NE DE w MWP E Jm w WA M No. 482,962. Patented Sept. 20, 1892.

INV TORK WITNESSES (No Model.) 4 Shee-tsSheet 3.

W. J. GORDON 8: E. D. GILBERT. MACHINE FOR EDGE GURLING SHEET METAL.

No. 482,962. Patented Sept. 20, 1892.

WITNESSES:

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(No Model.) 4 Sheets-Sheet 4.v W. J. GORDON 8: E. D. GILBERT. MACHINE FOR EDGE 'GURLING SHEET METAL. No. 482,962. Patented Sept. 20, 1892.

S E S S E N T I w UNITED STATES PATENT OFFICE.

WILLIAM. J. GORDON AND EDMUND D. GILBERT, OF PHILADELPHIA, PENNSYLVANIA.

MACHINE FOR EDGE-CURLING SHEET METAL.

SPECIFICATION forming part of Letters Patent No. 482,962, dated September 20, 1892.

Application filed February 27, 1892- Serial No. 423,003. (No model.)

To all whom it may concern.-

Be it known that we, WILLIAM J. GORDON and EDMUND D. GILBERT, citizens of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have lnvented a newandusefullmprovement in Machines for Edge-Curling Sheet Metal, which mprovement is fully set forth in the follow- 1n g specification and accompanying drawings.

Our invention consists of a machine for edge-curling sheet metal, the same embody- 1ng dies for partially bending the metal and afterward fully completing the operation of curl-forming, as will be hereinafter fully set forth.

Figures 1 and 2 represent side elevations of a machine for edge-curling sheet metal embodying our invention. Fig. 3 represents a side elevation of a detached portion thereof.

section of a portion on line x 00, Fig. 1.

Figs. 4., 5, and 6 represent vertical sections of portions of the machine, showing the steps of the operation. Fig. 7 represents a vertical Fig. 8 represents a perspective view of the product of the machine.

Similar letters of reference indicate corresponding parts in the several figures.

Referring to the drawings, A designates the frame of the machine, in the upper portion of which is guided a die B, which has aconcave working face 0. To the head Bat the upper end of said die B is movably attached a clampjaw D, whose working face is above the clampjaw E, the latter being secured to the table F of the machine The head D of the clampjaw D is provided with vertical slots G, through which are freely passed the screws or bolts H, which are secured to the head B of the die B. To the head D of the clampjaw D are pivoted the rods J, whose upper ends are connected with levers K, which are mounted on the upper portion of the frame A and are engaged by cams L ona drivingshaft M.

interposed between the working face 0 of the die B and the clamp-jaw D is a verticallymovable head N, which is connected with the head of said die B by means of a screw N, on which is a spring P, the tendency of which is to force said head N downwardly. Below said head is a rising-and-falling bed Q, which is guided in the frame of the machine and lowered by the action of springs R, bearing against the sides of said bed and proper portions of the frame of the machine and raised by means of the cam S, which bears against aroller on said bed Q. The cam S is mounted on ash-aft S, whose bearings are on the frame A and which carries a crank-arm T, with which latter is connected the slotted end of a link U, whose upper end is pivoted to a crank-wheel V on a driving-shaft M. To said wheel V is also pivoted the link W, whose lower end is slotted and pivoted to an oscillating crank-arm X, which is attached to a shaft Y, the latter carrying a cam Z, which is adapted to bear against a horizontallymoving die A, which is mounted on a table 13 of the machine and has a concave working face 0, which, as will be seen, is at the inner side of said die A, it being also seen that the inner side of the clamp E has a concave face D which is opposite the concave face 0' of the die A, it being also noticed that the upper end of the bed Q is adapted to move up and down between said working faces O D as most clearly seen in Figs. 4 and 5.

The crank-arm T is provided with a handle T ,to which is pivoted a dog E, the same having shoulders F and F either of which is adapted to engage with a log G on the frame A, said dog E being also provided with a toe E, which is adapted to be engaged by a foot E on the link U, whereby the dog may be thrown off of the lug G as will be hereinafter more fully stated.

H designates springs connected with the levers K and the frame A for restoring said lovers to their normal position, and consequently raising the rods J and clamp D.

J designates a spring connected with the crank-arm X and the frame A for restoring said arm, and consequently the cam Z, to its first position.

K designates a spring connected with the arm T and frame A for lowering the cam S.

L designates a spring for holding the dog E in contact with the lug G M designates .a spring for returning the die A after being released from the action of the cam Z. Motion is imparted to the die 13 by means of a yoke N whose lower end is pivoted to the head B of said die B and which encircles an eccentric P, secured to the shaft M.

The operation is as follows, the parts being in the position shown in Fig. 4: A piece of sheet metal is placed upon the table F over the clamp-jawE and bed Q and rested against the side of the die A asa gage. The machine is now set in motion by the operation of a suitable treadle and clutch, when the clamp D is lowered and presses the metal against the clamp E, thus firmly holding the same, after which the die B descends, whereby its working face 0 forces the end of the metal against the top of the bedQand partly curves or bends the same thereagainst, as shown in dotted lines in said Fig. at and fully in Fig. 5, the bed being held stationary by the cam S and the metal prevented from rising between the bend and the clamp-jaw D, owing to the downward pressure exerted by the head N. The die B and head N now rise, and as the cam S rotates the bed Q is permitted to lower, the plate being, however, held by the clamp-jaws D and E. Then the die A advances toward the face D of the clamp E, whereby the metal as partly bent is pressed toward said face D and likewise against the same and fully bent around, whereby a curl Q is formed. (See Figs. 6 and 8.) The cam Z returns to its first position and the die A is released, so that it withdraws from the curled metal, after which the clampjaw D rises, whereby the plate as curled may be removed and a fresh plate placed upon the table F and over the clamp-jaw E and bed Q and rested against the side or gage of the die A, after which the operation of bending the metal to form a curl thereon is similar to those hereinbefore stated. It will be noticed that when the link W rises it carries the crankarm X with it and imparts a partial rotation thereto, whereby the cam Z receives motion in one direction andadvances the die A. \Vhen said link lowers, owing to the slotted connection of the same with the arm X, the latter is subjected to the action of the spring J, whereby said cam Z is restored to its normal position. When the link U rises, it carries with it the dog E, and the latter is caused to engage by its shoulder F with the lug G whereby the arm T and link U are held,thus retaining the bed Q in elevated position while the metal is being bent thereon by the opera tion of the die B. WVhen the link descends, the foot E strikes the toe E thus unlocking the dog E. Then the spring K draws down the arm T, it being noticed that said link has a slotted connection with said arm. The shaft S is thus operated, whereby the cam S is rotated, and thus the bed Q is permitted to descend and leave the partiallybent metal, which is sustained above the same, so that the die A has subsequently an unobstructed passage toward the working face D of the clamp-jaw E, in order to fully bend the metal into curl. It will be observed that the part E is both clamp and die, owing to its position below the clamp-jaw D and the working face D. When the dog E is released from the lug G the descent of the arm T is limited by the engagement of the shoulder F with said lug.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. A machine for the purpose named, having a frame with a table thereon, a movable die above said table, a stationary clampaw on said bed, a clamp-j aw movable on the head of said die, a rising-and-falling bed below said table, and a horizontally-movable die in rear of said bed, said parts being combined substantially as described.

2. In a machine for the purpose named, a frame, a shaft journaled therein and having a cam thereon, a die guided in said frame, a clamp-jaw secured to the head of said die, rods pivoted to the head of said jaw, levers connected to the upper end of said rods and engaged by the cams on said shaft, a vertically-movable head, and a rising-and-falling bed, and a clamp secured to the table of the machine, said vertically-movable head being between the said die and its attached clamp, said parts being combined substantially as described.

3. In a machine for the purpose named, a frame, a die movable in guides thereon, a table with a clamp-jaw secured thereto, a risingand-fallin g clamp-j aw above said table-clamp, a spring-controlled head between said die and upper clamp-jaw, a rising-and-fallingbed, and a horizontally-movable die, said bed being adapted to move between said horizontallymovable die and the table clamp-jaw, said parts being combined substantially as described. Y

4. The bed Q and cam S for operating the same,in combination with an arm secured to the shaftof said cam, a link attached to said arm, means for raising said link, a shouldered dog pivoted to said arm, and a lug on the frame, with which the shoulder of the dog is adapted to engage, and means for throwing off said dog from said lug, substantially as described.

5. In a machine for the purpose named, a frame, a stationary and a vertically-moving clamp-j aw, a rising-and-falling bed, and a vertically-movable die with a connected springcontrolled head, and a horizontally-movable die, said stationary clamp-jaw and said horizontally-movable die having opposite concave faces, and said spring-controlled head being between the vertically-movable die and said vertically-movable clamp-jaw, said parts being combined substantially as described.

WILLIAM J. GORDON. EDMUND D. GILBERT. WVitnesses:

JOHN A. WIEDERSHEIM, A. P. JENNINGS. 

